diff --git a/mail/sendmail-devel/Makefile b/mail/sendmail-devel/Makefile
index 1e1bd2fac092..9888cab01086 100644
--- a/mail/sendmail-devel/Makefile
+++ b/mail/sendmail-devel/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	sendmail
-PORTVERSION=	8.18.1.9
+PORTVERSION=	8.18.1.10
 PORTREVISION=	0
 CATEGORIES=	mail
 MASTER_SITES=	ftp://ftp.sendmail.org/pub/sendmail/snapshots/
diff --git a/mail/sendmail-devel/distinfo b/mail/sendmail-devel/distinfo
index abad3668fbcd..58b4aa4e6209 100644
--- a/mail/sendmail-devel/distinfo
+++ b/mail/sendmail-devel/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1740492424
-SHA256 (sendmail.8.18.1.9.tar.gz) = 3e8b517f222d688b332999c42ed76756e8083dd107e77a82cf4a5595683bb7a2
-SIZE (sendmail.8.18.1.9.tar.gz) = 2365426
+TIMESTAMP = 1745169764
+SHA256 (sendmail.8.18.1.10.tar.gz) = cecedf5e9595ef4b869ffa8546a587e7eb35da575c1d3f70e9aa1297e7566cdc
+SIZE (sendmail.8.18.1.10.tar.gz) = 2367668
diff --git a/mail/sendmail-devel/files/patch-readcf.c b/mail/sendmail-devel/files/patch-readcf.c
index c777f3c55f1e..8fb1dbefc2c8 100644
--- a/mail/sendmail-devel/files/patch-readcf.c
+++ b/mail/sendmail-devel/files/patch-readcf.c
@@ -1,6 +1,6 @@
---- sendmail/readcf.c.orig	2024-01-25 05:27:02 UTC
+--- sendmail/readcf.c.orig	2025-04-09 08:39:43 UTC
 +++ sendmail/readcf.c
-@@ -3208,6 +3208,10 @@ static struct optioninfo
+@@ -3206,6 +3206,10 @@ static struct optioninfo
  	{ "CipherSuites",		O_CIPHERSUITES,	OI_NONE	},
  #endif
  
@@ -11,10 +11,10 @@
  	{ NULL,				'\0',		OI_NONE	}
  };
  
-@@ -4943,6 +4947,12 @@ setoption(opt, val, safe, sticky, e)
+@@ -4941,6 +4945,12 @@ setoption(opt, val, safe, sticky, e)
  #if _FFR_MTA_STS
  	  case O_MTASTS:
- 		MTASTS = atobool(val);
+ 		StrictTransportSecurity = atobool(val);
 +		break;
 +#endif
 +